Exercise bar mounted on door frame

An exercise bar mounted on a door frame comprising:

• two hinges, each hinge including a circular plate fixed to the interior surface of the door frame and a support plate provided adjacent to the circular plate, wherein the circular plate and the support plate are fixed to the door frame, such that the hinges are fixed to opposing sides of the door frame;
• a pair of support brackets, each support bracket rotatably installed on one of the hinges, and comprising:
• a circular hole, provided at one end of the support bracket, into which the circular plate of one hinge is inserted,
• wherein the support plate of the inserted hinge has a larger diameter than the circular hole to prevent the support bracket from escaping from the hinge;
• a first pipe fixing hole provided at the opposite end of the support bracket from the circular hole;
• and
• a second pipe fixing hole provided between and below the circular hole and the first pipe fixing hole;
• a first pipe having two ends, wherein the first pipe ends are inserted through the first pipe fixing holes of opposing support brackets, such that the first pipe is fixed in a transverse direction between the support brackets;
• and
• a second pipe having two ends, wherein the second pipe ends are inserted through the second pipe fixing holes of opposing support brackets, such that the second pipe is in a transverse direction between the support brackets and supported at a front side of the door frame to prevent the support brackets from rotating downward.